Mathematics, 19.08.2021 21:40, titofigueroa777
A statistics professor was interested in using final lab grades to predict final course grades. She found the following descriptive statistics. Grades are reported as percentages.
average lab grade = 75, SD = 20
average final grade= 80, SD = 15, r = 0.60
a) What is the slope of the regression line for her predictions?
b) What is the intercept of the regression line for her predictions?
c) What is the RMS error for her predictions?
d) Predict the final grade for students who earned an 85% in lab.
e) Predict the final grade for students who earned a 65% in lab.
f) Report the percent of students who are predicted to have final grades between 68% and 92%.
g) Select the correct discription.
1. The strength of the correlation may be overemphasized because of the use of rates.
2. This correlation represents an accurate assessment of the effect of lab grades on final grades.
3. A student who skips the labs is predict to have a passing final grade (70% or above).
4. All of the above are true.
Answers: 3
Mathematics, 21.06.2019 18:00, angeladominguezgarci
Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10
Answers: 1
Mathematics, 21.06.2019 22:00, elondamason
Which of these triangle pairs can be mapped to each other using a single translation? cof hn
Answers: 2
Mathematics, 22.06.2019 00:30, ejones123
Select the correct answer. employee earnings per month($) 1 1,200 2 2,600 3 1,800 4 1,450 5 3,500 6 2,800 7 12,500 8 3,200 which measure of spread is best for the data in the table? a. range b. quartiles c. interquartile range d. mean absolute deviation
Answers: 2
A statistics professor was interested in using final lab grades to predict final course grades. She...
Mathematics, 28.07.2019 19:00
Biology, 28.07.2019 19:00
Mathematics, 28.07.2019 19:00
Biology, 28.07.2019 19:00
History, 28.07.2019 19:00